InChI=1S/C21H28O3/c1-19-8-6-17-15(7-10-24-17)16(19)5-9-20-11-14(3-4-18(19)20)21(12-20,13-22)23-2/h6-8,10,14,16,18,22H,3-5,9,11-13H2,1-2H3/t14-,16-,18+,19-,20+,21+/m1/s1